| EPSRC Reference: |
GR/N03037/01 |
| Title: |
EARLY VISUAL PROCESSING AND THE EFFECTS OF VARIABLE ILLUMINATION |
| Principal Investigator: |
Baddeley, Dr R |
| Other Investigators: |
|
| Researcher Co-Investigators: |
|
| Project Partners: |
|
| Department: |
Sch of Psychology |
| Organisation: |
University of Sussex |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
10 July 2000 |
Ends: |
09 July 2003 |
Value (£): |
135,127
|
| EPSRC Research Topic Classifications: |
| Vision & Senses - ICT appl. |
|
|
| EPSRC Industrial Sector Classifications: |
| Creative Industries |
Information Technologies |
| No relevance to Underpinning Sectors |
|
|
| Related Grants: |
|
| Panel History: |
|
|
Summary on Grant Application Form |
|
Images in the real world are the result of the reflectance of surfaces multiplied by the changing characteristics of the illuminant. Within a scene the illuminant can change over three orders of magnitude, between scenes it can change over seven or eight. This presents a problem because for most tasks the illuminant is irrelevant. Two scenes with different lighting can have vastly different luminance structure, but have exactly the same behavioural significance: illumination acts as noise.Much work has successfully used the statistics of natural images our understand low level vision, but all previous work has concentrated on the luminance structure of images: variation due to changing illuminant are not distinguished from changes due to reflectance. Here we propose to collect a database of nature images and identify the separate contributions of illumination and reflectance. These will be used to construct Bayesian models of increasing sophistication that estimate the reflectance given the luminance. These models will be evaluated by 1) their ability to estimate reflectance, 2) how well they quantitatively account for processing in LGN and V1, and 3) if they are compatible with the vast literature on human lightness perception.
|
|
Key Findings |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Potential use in non-academic contexts |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Impacts |
|
| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
|
| Date Materialised |
|
|
|
|
Sectors submitted by the Researcher |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
| Project URL: |
|
| Further Information: |
|
| Organisation Website: |
http://www.sussex.ac.uk |